diff --git a/tests/unit/security/pib/identity.t.cpp b/tests/unit/security/pib/identity.t.cpp
new file mode 100644
index 0000000..d10c7bf
--- /dev/null
+++ b/tests/unit/security/pib/identity.t.cpp
@@ -0,0 +1,101 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013-2018 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#include "security/pib/identity.hpp"
+#include "security/pib/pib.hpp"
+#include "security/pib/pib-memory.hpp"
+#include "security/pib/detail/identity-impl.hpp"
+
+#include "boost-test.hpp"
+#include "pib-data-fixture.hpp"
+
+namespace ndn {
+namespace security {
+namespace pib {
+namespace tests {
+
+using namespace ndn::security::tests;
+
+BOOST_AUTO_TEST_SUITE(Security)
+BOOST_AUTO_TEST_SUITE(Pib)
+BOOST_FIXTURE_TEST_SUITE(TestIdentity, PibDataFixture)
+
+using pib::Pib;
+
+BOOST_AUTO_TEST_CASE(ValidityChecking)
+{
+  using security::pib::detail::IdentityImpl;
+
+  Identity id;
+
+  BOOST_CHECK_EQUAL(static_cast<bool>(id), false);
+  BOOST_CHECK_EQUAL(!id, true);
+
+  if (id)
+    BOOST_CHECK(false);
+  else
+    BOOST_CHECK(true);
+
+  auto identityImpl = make_shared<IdentityImpl>(id1, make_shared<PibMemory>(), true);
+  id = Identity(identityImpl);
+
+  BOOST_CHECK_EQUAL(static_cast<bool>(id), true);
+  BOOST_CHECK_EQUAL(!id, false);
+
+  if (id)
+    BOOST_CHECK(true);
+  else
+    BOOST_CHECK(false);
+}
+
+/**
+ * pib::Identity is a wrapper of pib::detail::IdentityImpl.  Since the functionalities of
+ * IdentityImpl have already been tested in detail/identity-impl.t.cpp, we only test the shared
+ * property of pib::Identity in this test case.
+ */
+BOOST_AUTO_TEST_CASE(Share)
+{
+  using security::pib::detail::IdentityImpl;
+
+  auto identityImpl = make_shared<IdentityImpl>(id1, make_shared<pib::PibMemory>(), true);
+  Identity identity1(identityImpl);
+  Identity identity2(identityImpl);
+  BOOST_CHECK_EQUAL(identity1, identity2);
+  BOOST_CHECK_NE(identity1, Identity());
+  BOOST_CHECK_EQUAL(Identity(), Identity());
+
+  identity1.addKey(id1Key1.data(), id1Key1.size(), id1Key1Name);
+  BOOST_CHECK_NO_THROW(identity2.getKey(id1Key1Name));
+  identity2.removeKey(id1Key1Name);
+  BOOST_CHECK_THROW(identity1.getKey(id1Key1Name), Pib::Error);
+
+  identity1.setDefaultKey(id1Key1.data(), id1Key1.size(), id1Key1Name);
+  BOOST_CHECK_NO_THROW(identity2.getDefaultKey());
+}
+
+BOOST_AUTO_TEST_SUITE_END() // TestIdentity
+BOOST_AUTO_TEST_SUITE_END() // Pib
+BOOST_AUTO_TEST_SUITE_END() // Security
+
+} // namespace tests
+} // namespace pib
+} // namespace security
+} // namespace ndn